G608XX Flowmeter

Technical SpecificationFLUXUS G608**-A2

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FLUXUS G608 supported by handle

Measurement with transducers mounted by the portable Variofix VP

Measurement with the flow transmitter fixed to the pipe by the QuickFix pipe mounting fixture

FLUXUS G608

FLUXUS G608

Portable Ultrasonic Flow Measurement of Gas in Hazardous Areas

Portable instrument for non-invasive, quick ultrasonic flow measurement with clamp-on technology for all types of piping

Features

Precise bi-directional and highly dynamic flow measure-ment with the non-intrusive clamp-on technology

High precision at fast and slow flow rates, high tem-perature and zero point stability

Portable, easy-to-use flow transmitter with 2 flow chan-nels, multiple inputs/outputs, an integrated data logger with a serial interface

Extremely resistant carbon fiber housing Covered by ATEX/IECEx zone 2 certification Compact and very lightweight, allowing the measuring

system to be easily carried as personal luggage, e.g. for offshore visits

Water tight; resistant against oil, many liquids and dirt Li-Ion battery provides up to 14 hours of measurement

operation Automatic loading of calibration data and transducer

detection for a fast and easy set-up (less than 5 min), providing precise and long-term stable results

User-friendly design Transducers available for a wide range of inner pipe

diameters ( ) and fluid temperatures ( )

Rugged transducers (ATEX/IECEx zone 1 and 2,resistant to rough environments, dust and humidity)

Robust, water-tight (IP67) transport case with compre-hensive accessories

QuickFix for fast mounting of the flow transmitter indifficult conditions

Applications

Designed for the following industries: Upstream (on- and offshore) Midstream and downstream (pipelines and refineries) Chemical industry Energy sector (e.g. HVAC, geothermal, power plants)

6...1600 mm-40...+200 C

FLUXUS G608**-A2 Technical Specification

Table of Contents

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Function ........................................................................................................................................................... 3Measurement Principle ..................................................................................................................................... 3Calculation of Volumetric Flow Rate ................................................................................................................. 3Number of Sound Paths.................................................................................................................................... 4Typical Measurement Setup ............................................................................................................................. 5Standard Volumetric Flow Rate ........................................................................................................................ 6

Flow Transmitter ............................................................................................................................................. 7Technical Data .................................................................................................................................................. 7Dimensions ....................................................................................................................................................... 9Standard Scope of Supply ................................................................................................................................ 9Adapters (optional).......................................................................................................................................... 10

Transducers................................................................................................................................................... 12Transducer Selection ...................................................................................................................................... 12Transducer Order Code .................................................................................................................................. 15Technical Data ................................................................................................................................................ 16

Transducer Mounting Fixture ...................................................................................................................... 26

Coupling Materials for Transducers............................................................................................................ 27

Damping Mats (optional) .............................................................................................................................. 28

Connection Systems..................................................................................................................................... 29Transducer Cable............................................................................................................................................ 29

Clamp-on Temperature Probe (optional) .................................................................................................... 30

Wall Thickness Measurement (optional)..................................................................................................... 31

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Technical Specification FLUXUS G608**-A2

Function

Measurement PrincipleIn order to measure the flow of a medium in a pipe, ultrasonic signals are used, employing the transit time dif-ference principle. Ultrasonic signals are emitted by a transducer installed on the pipe and received by a sec-ond transducer. These signals are emitted alternately in the flow direction and against it.As the medium in which the signals propagate is flowing, the transit time of the ultrasonic signals in the flowdirection is shorter than against the flow direction.The transit time difference, t, is measured and allows the flowmeter to determine the average flow velocityalong the propagation path of the ultrasonic signals. A flow profile correction is then performed in order to ob-tain the area averaged flow velocity, which is proportional to the volumetric flow rate.Two integrated microprocessors control the entire measuring process. This allows the flowmeter to removedisturbance signals, and to check each received ultrasonic wave for its validity which reduces noise.

Calculation of Volumetric Flow Rate

= kRe . A . ka . t/(2 . tfl)where

Path of the ultrasonic signal Transit time difference t

- volumetric flow ratekRe - fluid mechanics calibration factorA - cross-sectional pipe areaka - acoustical calibration factort - transit time differencetfl - transit time in the medium

V

V

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FLUXUS G608**-A2 Technical Specification

Number of Sound PathsThe number of sound paths is the number of transits of the ultrasonic signal through the medium in the pipe.Depending on the number of sound paths, the following methods of installation exist: reflection arrangement

The number of sound paths is even. Both of the transducers are mounted on the same side of the pipe. Correct positioning of the transducers is easier.

diagonal arrangementThe number of sound paths is odd. Both of the transducers are mounted on opposite sides of the pipe. In the case of a high signal attenuation by the medium, pipe and coatings, diagonal arrangement with 1 sound path will be used.

The preferred method of installation depends on the application. While increasing the number of sound pathsincreases the accuracy of the measurement, signal attenuation increases as well. The optimum number ofsound paths for the parameters of the application will be determined automatically by the transmitter.As the transducers can be mounted with the transducer mounting fixture in reflection arrangement or diagonalarrangement, the number of sound paths can be adjusted optimally for the application..

a - transducer distance

Reflection arrangement, number of sound paths: 2

Diagonal arrangement, number of sound paths: 3

Diagonal arrangement, number of sound paths: 1 Diagonal arrangement, number of sound paths: 1,negative transducer distance

a

a

a > 0 a < 0

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Technical Specification FLUXUS G608**-A2

Typical Measurement Setup

ATEX zone 2

ATEX zone 2/ATEX zone 1

!

" # " $ %

outputs

ATEX zone 2

damping mat

outside of explosive atmosphere

output adapter

(power adapter)

transducers

temperature probes

transmitter

!

" # " $ %

ATEX zone 2 ATEX zone 1

transducers

outputs

damping mat

outside of explosive atmosphere

(power adapter)

output adapter

transmitter

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FLUXUS G608**-A2 Technical Specification

Standard Volumetric Flow RateThe standard volumetric flow rate can be selected as physical quantity to be measured. It will be calculated in-ternally by:

N = . p/pN . TN/T . 1/Kwhere

The operational pressure p and the operational temperature T of the medium will be entered directly as fixedvalues into the transmitter.

or:If inputs are installed (optional), pressure and temperature can be measured by the customer and fed in thetransmitter.